Evans' team injected doses of FGF1 into obese mice with diabetes to assess the protein's potential impact on metabolism. Researchers were stunned by what happened: they found that with a single dose, blood sugar levels quickly dropped to normal levels in all the diabetic mice.
"Many previous studies that injected FGF1 showed no effect on healthy mice," says Michael Downes, a senior staff scientist and co-corresponding author of the new work. "However, when we injected it into a diabetic mouse, we saw a dramatic improvement in glucose."